Carbonyl compounds can generally be converted to hydrocarbons by

The reaction $Ph-CDO \xrightarrow{50\% \text{ aq. } NaOH, \text{ warm}} Ph-COO^- + \text{an alcohol}$. This alcohol is:

An organic compound neither reacts with neutral ferric chloride solution nor with Fehling solution. It,however,reacts with Grignard reagent and gives a positive iodoform test. The compound is:

The increasing order of the rate of $HCN$ addition to the following compounds is:
$(A)\ HCHO$
$(B)\ CH_3COCH_3$
$(C)\ PhCOCH_3$
$(D)\ PhCOPh$

The major product $Y$ in the following reaction is:

Which carbonyl group is most reactive for $NAR$ (Nucleophilic Addition Reaction)?